Backlight Source Control Method Of Display Device, Display Device And Storage Medium

ABSTRACT

One or more embodiments of the present application disclose a backlight source control method of a display device, the display device and a storage medium, The method includes: determining a display subregion corresponding to a backlight source to be turned off; determining a first backlight source brightness value of an adjacent display subregion of the display subregion corresponding to the backlight source to be turned off; lowering the first backlight source brightness value to obtain a second backlight source brightness value; and setting the backlight source brightness value corresponding to the adjacent display subregion to be the second backlight source brightness value.

CROSS-REFERENCES TO RELATES APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.14/547,508, filed on Nov. 19, 2014, which claims priority to ChinesePatent Application No. 201410438740.3, filed on Aug. 28, 2014, ChinesePatent Application No. 201410433098.X, filed on Aug. 28, 2014, andChinese Patent Application No. 201410432142.5, filed on Aug. 28, 2014,all of which are hereby incorporated by reference in their entireties,

FIELD

The disclosure relates to the field of backlight source control, and inparticular to a backlight source control method of a display device, thedisplay device and a storage medium.

BACKGROUND

A liquid crystal display device is a passive light emitting element, adisplay screen itself does not emit light, image display depends on apersistent backlight source provided by a backlight module in the liquidcrystal display device, the light emitted from the backlight source istransmitted out of the liquid crystal screen through turn-on andturn-off of liquid crystal molecules, and the image display is finallyrealized. The backlight source and the liquid crystal display screen arecombined together to form a liquid crystal display module. For example,in some liquid crystal display devices having a certain structure, alight source, an optical diaphragm and the like form a backlight sourceof a liquid crystal display; when the light emitted from the backlightsource is irradiated onto a liquid crystal panel, the light istransmitted upwards through a lower polarizer, different liquid crystalpanels would change the polarizing direction of the light according totheir own mechanisms at this moment, and then the light is in contactwith a color filter to produce colors and finally enters an upperpolarizer; and after the polarizing direction is changed by the liquidcrystal, one part of the light may be emitted out, the other part of thelight is absorbed, and each pixel on the whole liquid crystal panel maydecide respectively the intensity of the emergent light, so that animage is produced.

SUMMARY

One or more embodiments of the disclosure provide a backlight sourcecontrol method of a display device, the display device and a storagemedium.

At one aspect, one or more embodiments of the disclosure provide abacklight source control method of a display device, which includes:obtaining an image to be displayed; determining a first backlight sourcebrightness value of a first display subregion of the image correspondingto gray-scale values of pixels in the first display subregion, and asecond backlight source brightness value of a second display subregionof the image corresponding to gray-scale values of pixels in the seconddisplay subregion, wherein a second backlight subregion corresponding tothe second display subregion is adjacent to a first backlight subregioncorresponding to the first display subregion; in response to a firstbacklight source in the first backlight subregion to be turned off basedon the first backlight source brightness value, determining an adjustedsecond backlight source brightness value of the second display subregionby lowering the second backlight source brightness value; and driving asecond backlight source in the second backlight subregion according tothe adjusted second backlight source brightness value.

At another aspect, one or more embodiments of the disclosure provide adisplay device, which includes: a memory; and one or more processors,wherein the memory stores computer-readable program codes, and the oneor more processors are used to execute the computer-readable programcodes to implement: obtaining an image to be displayed; determining afirst backlight source brightness value of a first display subregion ofthe image corresponding to gray-scale values of pixels in the firstdisplay subregion, and a second backlight source brightness value of asecond display subregion of the image corresponding to gray-scale valuesof pixels in the second display subregion, wherein a second backlightsubregion corresponding to the second display subregion is adjacent to afirst backlight subregion corresponding to the first display subregion;in response to a first backlight source in the first backlight subregionto be turned off based on the first backlight source brightness value,determining an adjusted second backlight source brightness value of thesecond display subregion by lowering the second backlight sourcebrightness value; and driving a second backlight source in the secondbacklight subregion according to the adjusted second backlight sourcebrightness value.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of displaying an image with black regionsin a display screen;

FIG. 2 is a flow chart of a backlight source control method of a displaydevice according to one or more embodiments of the disclosure;

FIG. 3 shows a display screen division manner adopted in the 1D or 1.5Dlocal dimming technology;

FIG. 4 is a schematic diagram of displaying a image in a wide-screenfilm display mode in a display screen in one or more embodiments;

FIG. 5 is a schematic diagram of displaying the image in the wide-screenfilm display mode in a first region of the display screen in one or moreembodiments;

FIG. 6 is a schematic diagram of displaying the image in the wide-screenfilm display mode in a second region of the display screen in one ormore embodiments;

FIG. 7 is a flow chart of a backlight source control method in theprocess of entering or exiting from the wide-screen film display mode;

FIG. 8 is a structural schematic diagram of a display device in one ormore embodiments of the disclosure;

FIG. 9 is a structural schematic diagram of another display device inone or more embodiments of the disclosure.

DETAILED DESCRIPTION OF THE EMBODIMENTS

In order to make the purposes, technical solutions and advantages of oneor more embodiments of the disclosure clearer, the disclosure will befurther described below in combination with the accompanying drawings.Apparently, the embodiments described are merely a part, but not all, ofthe embodiments of the disclosure. All the other embodiments, obtainedby those ordinary skilled in the art based on the embodiments of thedisclosure without any creative effort, fall into the protection scopeof the disclosure.

When a display screen of a display device displays an image, a backlightmodule is required to provide a persistent backlight source for thedisplay screen. Besides providing the backlight source, the backlightmodule may further adjust the brightness of the backlight source, forexample, the backlight module may adjust the brightness of the backlightsource according to the required brightness of the image to bedisplayed. The display screen in the embodiments of the disclosure maybe an LCD.

One or more embodiments of the disclosure provide a backlight sourcecontrol method of a display device, the display device and a storagemedium.

Some embodiments of the disclosure will be described below incombination with the accompanying drawings.

As shown in FIG. 2, which is a flow chart of a backlight source controlmethod of a display device according to one or more embodiments of thedisclosure, the method includes followings.

Operation 201: determining a display subregion corresponding to abacklight source to be turned off.

Operation 202: determining a first backlight source brightness value ofan adjacent display subregion of the display subregion corresponding tothe backlight source to be turned off.

Operation 203: lowering the first backlight source brightness value toobtain a second backlight source brightness value.

Operation 204: setting the backlight source brightness valuecorresponding to the adjacent display subregion to be the secondbacklight source brightness value.

It should be noted that the operation 201 may be performed when an imageto be displayed starts to be displayed on the display screen of thedisplay device, or may be performed when the image to be displayed willbe displayed on the display screen of the display device, or may beperformed when the image to be displayed has been displayed on thedisplay screen of the display device.

The backlight sources of the display screen may be divided into aplurality of small groups of backlight sources through the local dimmingtechnology, a small group of backlight sources may be also named as abacklight subregion, and the display screen region corresponding to eachsmall group of backlight sources is called one display subregion. Eachdisplay screen may be divided into a plurality of display subregions,where each display subregion may be controlled by a separate backlightsubregion. For example, in one or more embodiments, as shown in FIG. 3,the display screen may be divided into 16 display subregions, includingdisplay subregions 1-16. Of course, in one or more other embodiments,the display screen may be divided into another number of displaysubregions.

In one or more embodiments, when the image is displayed in the displayscreen of the display device, the image may merely occupy a part of thedisplay screen. At this moment, the backlight sources corresponding tothe parts of display screen, which are not occupied by the image, may beturned off.

In the operation 201, the display subregion corresponding to thebacklight source to be turned off may be determined according tospecific situations. For example, the display subregion corresponding tothe backlight source to be turned off may be located in a predeterminedregion of the display screen, and as shown in FIG. 3, the displaysubregions corresponding to the backlight sources to be turned off maybe located at the top and/or bottom of the display screen or on the leftside and/or right side of the display screen. Of course, the displaysubregion corresponding to the backlight source to be turned off mayalso be located in another region of the display screen.

In the operation 203, the first backlight source brightness value may belowered to obtain the second backlight source brightness value inmultiple manners, for example, in one or more embodiments, the followingmanner may be adopted: obtaining a backlight source weight valuecorresponding to the first backlight source brightness value accordingto a mapping relation between backlight source brightness values andbacklight source weight values; and multiplying the backlight sourceweight value by the first backlight source brightness value to obtainthe second backlight source brightness value, where the backlight sourceweight value may be greater than 0 and less than 1.

Of course, the first backlight source brightness value may also belowered to obtain the second backlight source brightness value in othermanners.

One or more embodiments of the disclosure may achieve the followingtechnical effects: the light leak influence on the display subregion, ofwhich the backlight source has been turned off, may be reduced bylowering the backlight source brightness value of the adjacent displaysubregion. However the first backlight source brightness value of theadjacent display subregion is determined according to the pixels of theimage when the image is displayed in the adjacent display subregion, andtherefore, if the first backlight source brightness value is adjusted tobe too low, the display effect of the adjacent display subregion wouldbe affected. The manner of setting a backlight source weight value foreach backlight source brightness value may be used to lower the firstbacklight source brightness value of the adjacent display subregion andalso reduce the influence on the displayed image as much as possible.

In one or more embodiments of the disclosure, the display screen maydisplay an image in multiple manners, such as a wide-screen film displaymode, a liquid crystal television display mode or other display mode orthe like. The length-width ratio of the display screen in differentdisplay modes generally varies, for example, the length-width ratio ofthe display screen in the liquid crystal television display mode may be16:9 or another ratio; and the length-width ratio of the display screenin the wide-screen film display mode may be 21:9 or another ratio.

In one or more embodiments of the disclosure, it is taken as an examplefor description that the display screen displays the image in thewide-screen film display mode. Of course, the following schemes areapplicable to not only the wide-screen film display mode but also otherdisplay modes.

In one or more embodiments, the image in the wide-screen film displaymode has two characteristics: only black pictures are displayed in thefirst region at the uppermost part of the image; and when black picturesare displayed in the second region at the lowermost part of the image,subtitles may also be displayed in the second region, where the color ofthe subtitles is generally white, and of course, may also be anothercolor. For example, the length direction of the first region may extendalong the length direction of the display screen, the width direction ofthe first region may extend along the width direction of the displayscreen, and the width of the first region may be not larger than a halfof the width of the display screen; the length direction of the secondregion may extend along the length direction of the display screen, thewidth direction of the second region may extend along the widthdirection of the display screen, and the width of the second region maybe not larger than a half of the width of the display screen. At thismoment, the wide-screen film display mode may be determined according tothese characteristics. In one or more embodiments of the disclosure, itmay be judged whether the image displayed in the display screen entersthe wide-screen film display mode by adopting the following manners.

Obtaining the gray-scale value of a first image displayed in the firstregion and the gray-scale value of a second image displayed in thesecond region in the image to be displayed, and if both the averagegray-scale value of the first image in the first region and the averagegray-scale value of the second image in the second region are smallerthan a first threshold, determining that the image to be displayed is inthe wide-screen film display mode when being displayed in the displayscreen, where the first threshold is generally determined according toactual conditions, e.g., the first threshold may be any value between 0and 20.

Alternatively, if the average gray-scale value of the first image in thefirst region is smaller than the first threshold and the proportionoccupied by the pixels of which gray-scale values are 0 in the secondimage displayed in the second region at the bottom of the display screenis greater than a second threshold, determining that the image to bedisplayed is in the wide-screen film display mode when being displayedin the display screen, e.g., the value of the second threshold may be80% to 100%.

After determining that the gray-scale value of the image to be displayedsatisfies the condition of the wide-screen film display mode, it may hedetermined that the image to be displayed is displayed in thewide-screen film display mode.

In one or more embodiments, in order to improve the accuracy ofjudgment, on the basis that the image to be displayed satisfies theabove condition, a judgment condition may also be added: determiningwhether the continuous N frames of images previous to the image to bedisplayed are all displayed in the wide-screen film display mode whenbeing displayed in the display screen, if so, determining that the imageto be displayed is displayed in the wide-screen film display mode in thedisplay screen, where N is a positive integer, e.g., N is at leastgreater than 10.

In one or more embodiments, the display mode of the continuous N framesof images previous to the image to be displayed when being displayed maybe determined by adopting the following manner: obtaining the gray-scalevalues of pixels of first images and second images of the continuous Nframes of images previous to the image to be displayed, where N ispreset and is greater than 1; and determining that the continuous Nframes of images are displayed in the wide-screen film display mode ifthe gray-scale values of all the pixels in the first image and thesecond image of each frame of image in the N frames of images allsatisfy at least one of the following conditions.

The average gray-scale values of all the pixels in the first images andthe second images of the N frames of images are all smaller than thefirst threshold.

The average gray-scale values of all the pixels in the first images ofthe N frames of images are smaller than the first threshold and theproportion occupied by the pixels of which the gray-scale values are 0in the second image of at least one frame of image in the N frames ofimages is greater than the second threshold.

When each frame of image in the continuous N frames of images previousto the image to be displayed is in the wide-screen film display mode,and meanwhile the gray-scale values of the pixels of the image to bedisplayed also satisfy the condition of the wide-screen film displaymode, it may be determined that the image to be displayed is displayedin the wide-screen film display mode.

In one or more embodiments, in order to further increase the processingspeed, when it is detected whether the image displayed in the displayscreen is in the wide-screen film display mode, only a small part of thepixels of the image to be displayed in the preset display subregion maybe obtained for judgement, e.g., the pixel gray-scale values of pixelrows may be extracted from the first image and the second image atintervals to judge whether the image displayed in the display screen isin the wide-screen film display mode.

After it is determined that the image to be displayed in the displayscreen is in the wide-screen film display mode, the backlight sources ofa part of the display subregions of the display screen are turned offwhen the image in the wide-screen film display mode is displayed. In oneor more embodiments, the specific backlight source, which is to beturned off when the image in the wide-screen film display mode isdisplayed, may be determined by adopting multiple manners, e.g., thefollowing two manners.

As shown in FIG. 5, in the first situation, if the gray-scale values ofthe pixels of the image to be displayed in the display subregion of thefirst region are all 0, namely, all the pixels are black, the backlightsource does not need to be turned on at this time. However, due to thepresence of noise, the gray-scale values of some pixels are not 0, so inthe embodiments of the disclosure, the event that the average gray-scalevalue of the pixels of the image to be displayed in the displaysubregion is smaller than the first threshold is used as a conditionthat the backlight source does not need to be turned on, e.g., the valueof the first threshold is 0 to 2.0.

In the second situation, no subtitles are displayed in the displaysubregion of the second region. According to the characteristic of thegray-scale values of the pixels of the image when the subtitles aredisplayed, it is determined whether subtitles are displayed in thesecond region. As shown in FIG. 6, when the subtitles are displayed inthe display subregion of the second region, the gray-scale values of thepixels of the image to be displayed in the display subregion are mainly0, and the gray-scale values of a part of the pixels are a firstgray-scale value, where the first gray-scale value is generally 255.Thus, it is judged whether subtitles are displayed in the second regionby adopting the following manner: if the gray-scale value of at leastone pixel in at least one row of image pixels of the second image is thefirst gray-scale value, it is determined that the subtitles aredisplayed in the second region, where the first gray-scale value is 255.When the display subregion of the second region does not satisfy theabove condition, it may be determined that no subtitles are displayed inthe second region, and the backlight source of the display subregion maybe turned off.

In order to weaken the light diffusion of the adjacent display subregionof the display subregion, the backlight source brightness value of theadjacent display subregion may be adjusted in one or more embodiments ofthe disclosure. For example, after it is determined that the image to bedisplayed in the display screen is displayed in the wide-screen filmdisplay mode and the backlight sources of the display subregionscorresponding to the first region and the second region of the displayscreen are turned off, the first backlight source brightness value ofthe adjacent display subregions of the display subregions correspondingto the first region and the second region of the display screen isdetermined; the first backlight source brightness value is lowered toobtain the second source backlight brightness value; and when the imageto be displayed is displayed on the display screen, the backlight sourcebrightness values of the adjacent display subregions are set to be thesecond backlight source brightness value.

The light leak influence on the display subregion, of which thebacklight source has been turned off, may be reduced by lowering thebacklight source brightness value of the adjacent display subregion.However the first backlight source brightness value of the adjacentdisplay subregion is determined according to the pixels of the imagewhen the image is displayed in the adjacent display subregion, andtherefore, if the first backlight source brightness value is adjusted tobe too low, the display effect of the adjacent display subregion wouldbe affected. In one or more embodiments, the manner of setting abacklight source weight value for each backlight source brightness valuemay be used to lower the first backlight source brightness value of theadjacent display subregion and also reduce the influence on thedisplayed image as much as possible.

For example, the backlight source weight value corresponding to thefirst backlight source brightness value may be obtained according to themapping relation between the backlight source brightness values and thebacklight source weight values; and then the backlight source weightvalue is multiplied by the first backlight source brightness value toobtain the second backlight source brightness value, where the backlightsource weight value may be greater than 0 and less than 1.

When the backlight source weight value is the one from 0 to 1, theweighted backlight source brightness value is smaller than the originalbacklight source brightness value. Since the weighted backlight sourcebrightness value becomes smaller, the influence of the diffusion to thesurrounding regions also becomes smaller. The adjacent displaysubregions of the display subregion, of which the backlight source isturned off, are processed in this method, to thereby weaken the lightleak phenomenon due to the light diffusion of the backlight sources ofthe adjacent display subregions.

In addition, the backlight source weight value may alternatively begreater than 1, and at this time the weighted backlight sourcebrightness value will become greater, so that the saturation degree ofthe displayed image may be improved.

The mapping relation between the backlight source brightness values andthe backlight source weight values may be realized in a preset manner oran experimental manner. Data of light diffusion of the backlight sourceat different brightness values is obtained through experiments, and thecorresponding backlight source weight values are set for the differentbacklight source brightness values according to the data of lightdiffusion.

In one or more embodiments, the mapping relation between the backlightsource brightness values and the backlight source weight values may bedetermined in the following experimental manner: in the darkroomenvironment, the backlight sources of respective display subregions areturned on sequentially, the data of light diffusion under differentbacklight source brightness values is obtained, and finally the fittingfunction of the backlight source brightness values and the data of lightdiffusion is obtained. Different backlight source weight values are setfor different backlight source brightness values according to thefitting function; when the light diffusion degree is high, the backlightsource weight value of the corresponding backlight source brightnessvalue is set to be smaller; and when the light diffusion degree is low,the backlight source weight value of the corresponding backlight source,brightness value is set to be larger. The specific settings are based onactual measurements.

In one or more embodiments of the disclosure, the display subregioncorresponding to the backlight source to be turned off may be determinedin one of the following manners.

First manner: determining whether the image to be displayed is displayedin the wide-screen film mode in the display screen, if so, turning offthe backlight source corresponding to the display subregion in the firstregion of the display screen.

Second manner: determining whether subtitles are displayed in the secondregion of the display screen, if not, turning off the backlight sourcecorresponding to the display subregion in the second region.

In the two manners described above, the first region is located at thetop of the display screen, and the second region is located at thebottom of the display screen. In one or more embodiments, any one of thetwo manners may be performed separately; and in one or more otherembodiments, both the two manners may be performed simultaneously, andthe performing sequence is not limited.

In one or more embodiments of the disclosure, it may be determined thatthe image is displayed in the wide-screen film display mode in thefollowing manner.

Firstly, obtaining the image to be displayed, and determining a firstimage displayed in the first region of the display screen and a secondimage displayed in the second region of the display screen in the imageto be displayed, where the first region is located at the top of thedisplay screen, and the second region is located at the bottom of thedisplay screen.

Secondly, obtaining the gray-scale values of pixels in the first imageand the second image.

Finally, if both the average gray-scale value of all the pixels in thefirst image and the average gray-scale value of all the pixels in thesecond image are smaller than the first threshold, determining that theimage to be displayed is displayed in the wide-screen film display mode;or, if the average gray-scale value of all the pixels in the first imageis smaller than the first threshold and the proportion occupied by thepixels of which the gray-scale values are 0 in the second image isgreater than the second threshold, determining that the image to bedisplayed is displayed in the wide-screen film display mode.

In addition, one or more embodiments of the disclosure further provide abacklight source control method in the process of entering or exitingfrom the wide-screen film display mode, and as shown in FIG. 7, themethod may include followings.

Operation 701: determining the backlight source state of the displaysubregion in the display screen after receiving a switching instructionof the wide-screen film display mode.

Operation 702: determining whether the backlight source state of thedisplay subregion satisfies a backlight source control condition.

Operation 703: if so, setting the backlight source brightness value ofthe display subregion so that the backlight source brightness valuevaries monotonously when the continuous M frames of images starting fromthe image to be displayed are displayed in the display subregion.

In the operation 701, the display subregion may be the display subregioncorresponding to the black region in the wide-screen film display modein the display screen, and the backlight source state may be thebacklight source turn-on state or the backlight source turn-off state.In the operation 703, M may be a positive integer greater than 0.

If the switching instruction of the wide-screen film display mode isreceived for multiple times within a short time period, the backlightsource state of the display subregion, where the region displayingfixedly black pictures is located when the images in the wide-screenfilm display mode are displayed, is changed for multiple times. Thebacklight source state may comprise the backlight source turn-on stateor the backlight source turn-off state, and at this moment, thebacklight source are turned on and off continuously to produce theflicker phenomenon which will bring great stimulation to the vision of aviewer. For example, there are continuous five frames of images, thebacklight source states required by the display subregion, where theregion displaying fixedly black pictures is located when the images inthe wide-screen film display mode are displayed, are respectively asfollows: the backlight source turn-on state, the backlight sourceturn-off state, the backlight source turn-on state, the backlight sourceturn-off state and the backlight source turn-on state.

In one or more embodiments of the disclosure, the flicker phenomenon maybe avoided in the manner of delaying turning off or on the backlightsource. After the switching instruction of the wide-screen film displaymode is received, firstly the backlight source state of the displaysubregion in the display screen is determined, and then it is determinedwhether the backlight source state of the display subregion satisfiesthe backlight source control condition, for example, it is judgedwhether the backlight source state of the display subregion is identicalto the backlight source state when a frame of image previous to theimage to be displayed is displayed in the display subregion; if not, itis determined that the backlight source state of the display subregionsatisfies the backlight source control condition.

After it is determined that the backlight source state of the displaysubregion satisfies the backlight source control condition, thebacklight source brightness value of the display subregion is set sothat the backlight source brightness value varies monotonously whencontinuous M frames of images starting from the image to be displayedare displayed in the display subregion, where M may be a positiveinteger greater than 0.

There are two situations where the backlight source brightness value inthe display subregion varies monotonously. in the first situation, whenthe instruction of switching from the non wide-screen film display modeto the wide-screen film display mode is received, the regions, where thedisplay subregions of which the backlight sources need to be turned offin the wide-screen film display mode are located, are determined. Thebacklight sources corresponding to the display subregions in the firstregion definitely need to be turned off, and then it is judged whethersubtitles are displayed in the second region, if not, the backlightsources corresponding to the display subregions in the second region areturned off. At this moment, the backlight sources are not turned offimmediately, but are turned off after the M frames of images aredelayed, and meanwhile, the backlight source brightness values of thedelayed M frames of images in display are set so that the backlightsource brightness values of the delayed M frames of images are decreasedmonotonously according to the time sequence of displaying the images. Inthe monotonous change, the backlight source brightness value when theframe of image previous to the image to be displayed is displayed isused as the initial backlight source brightness value.

In one or more embodiments, the backlight source brightness values ofthe delayed M frames of images constitute an arithmetic progression. Ifit is determined that the backlight source is turned off when the imageto be displayed is displayed, and the backlight source of the displaysubregion is not turned off or the backlight source brightness valuethereof is not 0 when the previous frame of image is displayed, thenwhen the delayed M frames of images are displayed, the backlight sourcebrightness values of the M frames of images constitute the arithmeticprogression, where the backlight source brightness value of the displaysubregion when the previous frame of image is displayed serves as thefirst term and negative one M th of the backlight source brightnessvalue of the display subregion when the previous frame of image isdisplayed serves as the common difference. After the M frames aredelayed, the backlight source is turned off when the (M+1) th frame ofimage is displayed. For example, the backlight source brightness valueof the display subregion when the previous frame of image is displayedis 9 and three frames of images need to be delayed, and thus thebacklight source is not turned off when the image to be displayed isdisplayed, but the backlight source brightness value thereof is 9instead. At this moment, the first term is 9, the common difference is3, the backlight source brightness value of the delayed second frame ofimage is 6, the backlight source brightness value of the delayed thirdframe of image is 3, and finally the backlight source is turned off whenthe fourth frame of image is displayed.

In the second situation, when the instruction of switching from thewide-screen film display mode to the non wide-screen film display modeis received, the regions, where the display subregions of which thebacklight sources need to be turned on in the non wide-screen filmdisplay mode are located, are determined. The backlight sourcescorresponding to the display subregions in the first region definitelyneed to be turned on, and then it is judged whether subtitles aredisplayed in the second region, if not, the backlight sourcescorresponding to the display subregions in the second region are turnedon. At this moment, the backlight sources are not turned on immediately,but after M frames of images are delayed, the backlight sourcebrightness value required by the (M+1) th frame of image is set to bethe backlight source brightness value required by the image to bedisplayed, and meanwhile, the backlight source brightness values of thedelayed M frames of images in display are set so that the backlightsource brightness values of the delayed M frames of images are increasedmonotonously according to the time sequence of displaying the images. Inthe monotonous change, the backlight source brightness value when theframe of image previous to the image to be displayed is displayed isused as the initial backlight source brightness value.

In one or more embodiments, when the delayed M frames of images aredisplayed, the backlight source brightness values of the M frames ofimages constitute an arithmetic progression, where 0 serves as the firstterm and one Mth of the backlight source brightness value required bythe image to be displayed serves as the common difference. After the Mframes are delayed, the backlight source brightness value when the(M+1)th frame of image is displayed is set to be the backlight sourcebrightness value required by the image to be displayed. For example, thebacklight source brightness value required by the image to be displayedis 9 and three frames of images need to be delayed, and thus thebacklight source brightness value is 0 instead when the image to bedisplayed is displayed, and at this moment, the first term is 0, thecommon difference is 3, the backlight source brightness value of thedelayed second frame of image is 3, the backlight source brightnessvalue of the delayed third frame of image is 6, and finally thebacklight source brightness value is set to be 9 when the fourth frameof image is displayed.

One or more embodiments of the disclosure further provide a displaydevice, and as shown in FIG. 8, the display device may include: a memory81, and one or more processors 82, where the memory 81 may storecomputer-readable program codes, and the one or more processors 82 maybe used to execute the computer-readable program codes to implement:determining a display subregion corresponding to a backlight source tobe turned off; determining a first backlight source brightness value ofan adjacent display subregion of the display subregion corresponding tothe backlight source to be turned off; lowering the first backlightsource brightness value to obtain a second backlight source brightnessvalue; setting the backlight source brightness value corresponding tothe adjacent display subregion to be the second backlight sourcebrightness value.

It should be noted that the operation of determining the displaysubregion corresponding to the backlight source to be turned off may beperformed when an image to be displayed starts to be displayed on thedisplay screen of the display device, or may be performed when the imageto be displayed will be displayed on the display screen of the displaydevice, or may be performed when the image to be displayed has beendisplayed on the display screen of the display device.

In one or more embodiments, the operation of lowering the firstbacklight source brightness value to obtain the second backlight sourcebrightness value may comprise: obtaining a backlight source weight valuecorresponding to the first backlight source brightness value accordingto a mapping relation between backlight source brightness values andbacklight source weight values; and multiplying the backlight sourceweight value by the first backlight source brightness value to obtainthe second backlight source brightness value, where the backlight sourceweight value may be greater than 0 and less than 1.

In one or more embodiments, the display subregion corresponding to thebacklight source to be turned off may be located in a predeterminedregion of the display screen.

In one or more embodiments, the operation of determining the displaysubregion corresponding to the backlight source to be turned off maycomprise: determining whether the image to be displayed is displayed ina wide-screen film mode in the display screen, if so, turning off abacklight source corresponding to a display subregion in a first regionof the display screen; determining whether subtitles are displayed in asecond region of the display screen, if not, turning off a backlightsource corresponding to a display subregion in the second region, wherethe first region may be located at the top of the display screen, andthe second region may be located at the bottom of the display screen.

In one or more embodiments, the operation of determining whether theimage to be displayed is displayed in the wide-screen film mode in thedisplay screen may comprise: obtaining the image to be displayed, anddetermining a first image displayed in the first region of the displayscreen and a second image displayed in the second region of the displayscreen in the image to be displayed; obtaining gray-scale values ofpixels in the first image and the second image; if both an averagegray-scale value of all pixels in the first image and an averagegray-scale value of all pixels in the second image are smaller than afirst threshold which may be greater than 0, or, if the averagegray-scale value of all the pixels in the first image is smaller thanthe first threshold and a proportion occupied by pixels of whichgray-scale values are 0 in the second image is greater than a secondthreshold which may be greater than 0; determining that the image to bedisplayed is displayed in the wide-screen film mode.

In one or more embodiments, the operation of obtaining the gray-scalevalues of the pixels in the first image and the second image maycomprise: extracting pixel gray-scale values of pixel rows from thefirst image and the second image at intervals.

In one or more embodiments, the operation of determining whether thesubtitles are displayed in the second region may comprise: if agray-scale value of at least one pixel in at least one row of imagepixels of the second region is a predetermined gray-scale value,determining that the subtitles are displayed in the second region.

In one or more embodiments, the computer-readable program codes may befurther executed to implement: determining a backlight source statecorresponding to a display subregion in a predetermined region of thedisplay screen, wherein the backlight source state comprises a backlightsource turn-on state or a backlight source turn-off state; determiningwhether the backlight source state of the display subregion in thepredetermined region satisfies a backlight source control condition; ifso, setting a backlight source brightness value of the display subregionin the predetermined region so that the backlight source brightnessvalue varies monotonously when continuous M frames of images startingfrom the image to be displayed are displayed in the display subregion,where M may be a positive integer greater than 0.

In one or more embodiments, the operation of determining whether thebacklight source state of the display subregion satisfies the backlightsource control condition may comprise: judging whether the backlightsource state of the display subregion is identical to the backlightsource state when a frame of image previous to the image to be displayedis displayed in the display subregion; if not, determining that thebacklight source state of the display subregion satisfies the backlightsource control condition.

For the corresponding contents, reference may be made to the descriptionof the method, which will not be redundantly described herein.

In one or more embodiments, the display device may have a structureshown in FIG. 9. As shown in FIG. 9, the display device 900 may includea memory, an input unit, an output unit, one or more processors andother components. Those skilled in the art should understand that thestructure of the display device shown in FIG. 9 does not limit thedisplay device, and the display device may include more or lesscomponents as shown in the figure, or combine certain components, orhave different component arrangement.

The memory may be used for storing software programs and modules, andthe processor may run the software programs and the modules stored inthe memory to thereby implement various functional applications and dataprocessing. The memory may include a high-speed random access memory andmay also include a nonvolatile memory, such as at least one magneticdisk storage device, a flash memory device or other volatile solid-statestorage devices. In addition, the memory may also include a memorycontroller used to provide access of the processor and the input deviceto the memory.

The processor may be the control center of the display device 900, andmay be connected with respective parts of the whole display device viavarious interfaces and circuits, runs or implements the softwareprograms and/or the modules stored in the memory, invokes the datastored in the memory, implements the various functions of the displaydevice 900 and processes data, to thereby monitor the display device inoverall. Optionally, the processor may include one or more processingcores; and optionally, the processor may include an applicationprocessor and a modulation and demodulation processor, where theapplication processor is mainly used for processing the operatingsystem, user interfaces, application programs and the like, and themodulation and demodulation processor is mainly used for processingwireless communications. It may be understood that the modulation anddemodulation processor may not be integrated into the processor.

The display device 900 may include a television broadcast receiver, ahigh-definition multimedia interface, a USB port, an audio-video inputstructure and other input units. The input unit may further include aremote controller receiver for receiving signals transmitted from aremote controller. In addition, the input unit may further include atouch-sensitive surface and other input devices, where thetouch-sensitive surface may be implemented in a variety of types, suchas resistance type, capacitance type, infrared type, surface acousticwave and the like; and other input devices may include but not limitedto one or more of a physical keyboard, function keys (such as a volumecontrol key, a switch key and the like), a track ball, a mouse, anoperating rod and the like.

The output unit is configured to output sound signals, video signals,alarm signals, vibration signals and the like. The output unit mayinclude a display panel, a sound output module and the like. The displaypanel may be configured to display information input by a user orinformation provided to the user and also to display various graphicaluser interfaces of the display device 900, where these graphical userinterfaces may be composed of graphics, texts, icons, videos and anycombination thereof. For example, the display panel may adopt an LCD(Liquid Crystal Display), an OLED (Organic Light-Emitting Diode), aflexible display, a three-dimensional display, a CRT, a plasma displaypanel and the like.

The display device 900 may further include at least one sensor (notshown in the figure), e.g., a light sensor, a motion sensor and othersensors. Specifically, the light sensor may comprise an ambient lightsensor and a proximity sensor, where the ambient light sensor mayregulate the brightness of the display panel according to the brightnessof the ambient light, and the proximity sensor may close the displaypanel and/or backlight when the display device 900 is moved to a certainposition. The display device 900 may further be equipped with agyroscope, a barometer, a hygrometer, a thermometer, an infrared sensorand other sensors.

The display device 900 may further include an audio circuit (not shownin the figure), a speaker and a microphone, which may provide audiointerfaces between the user and the display device 900. The audiocircuit may convert the received audio data to electrical signals andthen transmit the electrical signals to the speaker, and the speakerconverts the electrical signals to sound signals for output; and on theother hand, the microphone converts the collected sound signals toelectrical signals, the electrical signals are received and thenconverted to the audio data by the audio circuit, and then the audiodata is output to the processor for processing and sent to anotherdevice, or the audio data is output to the memory to facilitate thefurther processing. The audio circuit may further comprise an earplugjack to provide communications between a peripheral earphone and thedisplay device 900.

In addition, the display device 900 may further include an RF (RadioFrequency) circuit. The RF circuit may be used for receiving andtransmitting signals. Generally, the RF circuit includes but not limitedto an antenna, at least one amplifier, a tuner, one or more oscillators,a subscriber identity module (SIM) card, a transceiver, a coupler, anLNA (Low Noise Amplifier), a diplexer and the like. In addition, thedisplay device 900 may further include a camera, a Bluetooth module andthe like.

Moreover, the display device 900 may further include a WiFi (WirelessFidelity) module (not shown in the figure). WiFi belongs to ashort-range wireless transmission technology, and the display device 900may help the user to receive and send e-mails, browse web pages, accessstreaming media and the like, and provide wireless broadband Internetaccess for the user through the WiFi module. Although the WiFi module isshown in FIG. 9, it may be understood that the WiFi module does notbelong to the necessary constitution component of the display device900, and may be omitted as needed in the range of not changing theessence of the disclosure.

In addition, one or more embodiments of the disclosure provide acomputer-readable storage medium, where the computer-readable storagemedium may be the computer-readable storage medium contained in thememory in the embodiment, or may be the computer-readable storage mediumwhich exists alone and is not assembled into the terminal. Thecomputer-readable storage medium stores one or more programs (in one ormore embodiments, the computer-readable storage medium may be one ormore magnetic disc storage devices, a flash memory device or othernon-volatile solid-state storage devices, a CD-ROM, an optical memoryand the like), where the one or more programs are executed by one ormore processors to implement the method described in any one of theabove embodiments.

Those skilled in the art shall appreciate that the embodiments of thedisclosure may be embodied as a method, a system or a computer programproduct. Therefore the disclosure may be embodied in the form of anall-hardware embodiment, an all-software embodiment or an embodiment ofsoftware and hardware in combination. Furthermore, the disclosure may beembodied in the form of a computer program product embodied in one ormore computer useable storage mediums (including but not limited to adisk memory, a CD-ROM, an optical memory, etc.) in which computeruseable program codes are contained.

The disclosure has been described with reference to flow charts and/orblock diagrams of the method, the device (system) and the computerprogram product according to the embodiments of the disclosure. It shallbe appreciated that respective flows and/or blocks in the flow chartsand/or the block diagrams and combinations of the flows and/or theblocks in the flow charts and/or the block diagrams may be embodied incomputer program instructions. These computer program instructions maybe loaded onto a general-purpose computer, a specific-purpose computer,an embedded processor or a processor of another programmable dataprocessing device to produce a machine so that the instructions executedon the computer or the processor of the other programmable dataprocessing device create means for performing the functions specified inthe flow(s) of the flow charts and/or the block(s) of the blockdiagrams.

These computer program instructions may also be stored into a computerreadable memory capable of directing the computer or the otherprogrammable data processing device to operate in a specific manner sothat the instructions stored in the computer readable memory createmanufactures including instruction means which perform the functionsspecified in the flow(s) of the flow charts and/or the block(s) of theblock diagrams.

These computer program instructions may also be loaded onto the computeror the other programmable data processing device so that a series ofoperational steps are performed on the computer or the otherprogrammable data processing device to create a computer implementedprocess so that the instructions executed on the computer or the otherprogrammable device provide steps for performing the functions specifiedin the flow(s) of the flow charts and/or the block(s) of the blockdiagrams.

Although the preferred embodiments of the disclosure have beendescribed, those skilled in the art benefiting from the underlyinginventive concept may make additional modifications and variations tothese embodiments. Therefore the appended claims are intended to beconstrued as encompassing the preferred embodiments and all themodifications and variations coming into the scope of the disclosure.

Evidently those skilled in the art may make various modifications andvariations to the disclosure without departing from the spirit and scopeof the disclosure. Thus the disclosure is also intended to encompassthese modifications and variations thereto so long as thesemodifications and variations come into the scope of the claims appendedto the disclosure and their equivalents.

1. A backlight source control method of a display device, comprising:obtaining an image to be displayed; determining a first backlight sourcebrightness value of a first display subregion of the image correspondingto gray-scale values of pixels in the first display subregion, and asecond backlight source brightness value of a second display subregionof the image corresponding to gray-scale values of pixels in the seconddisplay subregion, wherein a second backlight subregion corresponding tothe second display subregion is adjacent to a first backlight subregioncorresponding to the first display subregion; in response to a firstbacklight source in the first backlight subregion to be turned off basedon the first backlight source brightness value, determining an adjustedsecond backlight source brightness value of the second display subregionby lowering the second backlight source brightness value; and driving asecond backlight source in the second backlight subregion according tothe adjusted second backlight source brightness value.
 2. The method ofclaim 1, wherein the operation of determining the adjusted secondbacklight source brightness value of the second display subregion bylowering the second backlight source brightness value comprises:obtaining a backlight source weight value corresponding to the secondbacklight source brightness value according to a mapping relationbetween backlight source brightness values and backlight source weightvalues; and multiplying the obtained backlight source weight value bythe second backlight source brightness value to obtain the adjustedsecond backlight source brightness value, wherein the obtained backlightsource weight value is greater than 0 and less than
 1. 3. The method ofclaim 1, wherein the first display subregion corresponding to the firstbacklight source to be turned off is located in a predetermined regionof a display screen, wherein the predetermined region is at least one ofa first region located at the top of the display screen, and a secondregion located at the bottom of the display screen.
 4. The method ofclaim 1, wherein before the operation of determining the adjusted secondbacklight source brightness value of the second display subregion bylowering the second backlight source brightness value, the methodfurther comprises: in response to an average gray-scale value of allpixels in the first display subregion is smaller than a first threshold,turning off the first backlight source in the first backlight subregion,wherein the first threshold is greater than
 0. 5. The method of claim 4,wherein the operation of in response to the average gray-scale value ofall pixels in the first display subregion is smaller than the firstthreshold, turning off the first backlight source in the first backlightsubregion comprises: in response to the average gray-scale value of allpixels in the first display subregion is smaller than the firstthreshold, determining that the image is displayed in a wide-screen filmmode; and turning off the first backlight source in the first backlightsubregion.
 6. The method of claim 1, wherein before the operation ofdetermining the adjusted second backlight source brightness value of thesecond display subregion by lowering the second backlight sourcebrightness value, the method further comprises: in response to agray-scale value of at least one pixel in at least one row of imagepixels of the first display subregion is a predetermined gray-scalevalue, turning off the first backlight source in the first backlightsubregion.
 7. The method of claim 6, wherein the operation of inresponse to the gray-scale value of at least one pixel in at least onerow of image pixels of the first display subregion is the predeterminedgray-scale value, turning off the first backlight source in the firstbacklight subregion comprises: in response to the gray-scale value of atleast one pixel in at least one row of image pixels of the first displaysubregion is the predetermined gray-scale value, determining thatsubtitles are displayed in the first display subregion; determining thatthe image is displayed in a wide-screen film mode; and turning off thefirst backlight source in the first backlight subregion.
 8. The methodof claim 1, wherein the first display subregion comprises a top displaysubregion located at the top of a display screen and a bottom displaysubregion located at the bottom of the display screen.
 9. The method ofclaim 1, wherein before the operation of determining the adjusted secondbacklight source brightness value of the second display subregion bylowering the second backlight source brightness value, the methodfurther comprises: in response to a proportion occupied by pixels ofwhich gray-scale values are 0 gray in the first display subregion isgreater than a second threshold, turning off the first backlight sourcein the first backlight subregion, wherein the second threshold isgreater than
 0. 10. A display device, comprising: a memory; and one ormore processors, wherein the memory stores computer-readable programcodes, and the one or more processors are used to execute thecomputer-readable program codes to implement: obtaining an image to hedisplayed; determining a first backlight source brightness value of afirst display subregion of the image corresponding to gray-scale valuesof pixels in the first display subregion, and a second backlight sourcebrightness value of a second display subregion of the imagecorresponding to gray-scale values of pixels in the second displaysubregion, wherein a second backlight subregion corresponding to thesecond display subregion is adjacent to a first backlight subregioncorresponding to the first display subregion; in response to a firstbacklight source in the first backlight subregion to be turned off basedon the first backlight source brightness value, determining an adjustedsecond backlight source brightness value of the second display subregionby lowering the second backlight source brightness value; and driving asecond backlight source in the second backlight subregion according tothe adjusted second backlight source brightness value.
 11. The displaydevice of claim 10, wherein the operation of determining the adjustedsecond backlight source brightness value of the second display subregionby lowering the second backlight source brightness value comprises:obtaining a backlight source weight value corresponding to the secondbacklight source brightness value according to a mapping relationbetween backlight source brightness values and backlight source weightvalues; and multiplying the obtained backlight source weight value bythe second backlight source brightness value to obtain the adjustedsecond backlight source brightness value, wherein the obtained backlightsource weight value is greater than 0 and less than
 1. 12. The displaydevice of claim 10, wherein the first display subregion corresponding tothe first backlight source to be turned off is located in apredetermined region of a display screen, wherein the predeterminedregion is at least one of a first region located at the top of thedisplay screen, and a second region located at the bottom of the displayscreen.
 13. The display device of claim 10, wherein before the operationof determining the adjusted second backlight source brightness value ofthe second display subregion by lowering the second backlight sourcebrightness value, the one or more processors are used to execute thecomputer-readable program codes to implement: in response to an averagegray-scale value of all pixels in the first display subregion is smallerthan a first threshold, turning off the first backlight source in thefirst backlight subregion, wherein the first threshold is greater than0.
 14. The display device of claim 13, wherein the operation of inresponse to the average gray-scale value of all pixels in the firstdisplay subregion is smaller than the first threshold, turning off thefirst backlight source in the first backlight subregion comprises: inresponse to the average gray-scale value of all pixels in the firstdisplay subregion is smaller than the first threshold, determining thatthe image is displayed in a wide-screen film mode; and turning off thefirst backlight source in the first backlight subregion.
 15. The displaydevice of claim 10, wherein before the operation of determining theadjusted second backlight source brightness value of the second displaysubregion by lowering the second backlight source brightness value, theone or more processors are used to execute the computer-readable programcodes to implement: in response to a gray-scale value of at least onepixel in at least one row of image pixels of the first display subregionis a predetermined gray-scale value, turning off the first backlightsource in the first backlight subregion.
 16. The display device of claim15, wherein the operation of in response to the gray-scale value of atleast one pixel in at least one row of image pixels of the first displaysubregion is the predetermined gray-scale value, turning off the firstbacklight source in the first backlight subregion comprises: in responseto the gray-scale value of at least one pixel in at least one row ofimage pixels of the first display subregion is the predeterminedgray-scale value, determining that subtitles are displayed in the firstdisplay subregion; determining that the image is displayed in awide-screen film mode; and turning off the first backlight source in thefirst backlight subregion.
 17. The display device of claim 10, whereinthe first display subregion comprises a top display subregion located atthe top of a display screen and a bottom display subregion located atthe bottom of the display screen.
 18. The display device of claim 10,wherein before the operation of determining the adjusted secondbacklight source brightness value of the second display subregion bylowering the second backlight source brightness value, the one or moreprocessors are used to execute the computer-readable program codes toimplement: in response to a proportion occupied by pixels of whichgray-scale values are 0 gray in the first display subregion is greaterthan a second threshold, turning off the first backlight source in thefirst backlight subregion, wherein the second threshold is greater than0.